1 files changed, 10 insertions, 0 deletions

diff --git a/servconf.c b/servconf.c
index b7f941ab5..fb6332c31 100644
--- a/servconf.c
+++ b/servconf.c
@@ -256,6 +256,16 @@ fill_default_server_options(ServerOptions *options)
         /* Turn privilege separation on by default */
         if (use_privsep == -1)
                 use_privsep = 1;
+
+#if !defined(HAVE_MMAP) || !defined(MAP_ANON)
+        if (use_privsep && options->compression == 1) {
+                error("This platform does not support both privilege "
+                    "separation and compression");
+                error("Compression disabled");
+                options->compression = 0;
+        }
+#endif
+
 }
 
 /* Keyword tokens. */